I'm going to drift back to grade school and use sketches of rockets and UFOs, so the background will be a simple sheet of lined notebook paper with three punch holes.
我将回到小时候，使用火箭和ufo的草图，所以背景是一张简单的横线笔记簿纸张，上面有三个洞。
Nevertheless, some drift is likely to occur because it does take a finite amount of time to launch each subshell for the background processing.
但是，这个过程会发生一些时间偏差，因为需要花费一些时间启动每个子 shell 脚本来进行后台处理。
With NIR spectra, the analytical information is contained in small spectral variations and usually dominated by the features such as light scattering, background noise and baseline drift.
近红外光谱不但包含着物质成分信息，而且这些信息完全掩盖在众多复杂背景当中（包括光散射、背景噪声以及背景漂移）。
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